package com.sky.service.impl;

import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.time.LocalDateTime;
import java.util.*;
import java.util.stream.Collectors;

@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WebSocketServer webSocketServer;
    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //判断业务异常（以后外卖用postman下单了doge）
        //判断地址簿是否为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook == null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        //判断购物车是否为空
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.select(shoppingCart);
        if(shoppingCartList == null || shoppingCartList.isEmpty()){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //添加一条订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setUserId(userId);
        order.setOrderTime(LocalDateTime.now());
        order.setPayStatus(Orders.UN_PAID);
        order.setPhone(addressBook.getPhone());
        order.setConsignee(addressBook.getConsignee());
        order.setAddress(addressBook.getProvinceName()+' '+addressBook.getCityName()
                +' '+addressBook.getDistrictName()+' '+addressBook.getDetail());
        orderMapper.insert(order);
        //添加n条订单明细数据
        List<OrderDetail> orderDetailList = new ArrayList<>();
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insert(orderDetailList);
        //清空该用户的购物车
        shoppingCartMapper.deleteByUserId(userId);
        //封装返回vo对象
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        /*User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );*/
        JSONObject jsonObject = new JSONObject();
        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));
        paySuccess(ordersPaymentDTO.getOrderNumber());
        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //通过websocket向客户端浏览器推送消息 type orderId content
        Map map = new  HashMap();
        map.put("type",1);//1.表示来单提醒 2 表示客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","订单号:"+outTradeNo);

        String jsonString = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);
    }

    /**
     * 历史订单查询
     *
     * @return
     */
    @Override
    public PageResult pageQuery(OrdersPageQueryDTO ordersPageQueryDTO) {
        Long userId = BaseContext.getCurrentId();
        ordersPageQueryDTO.setUserId(userId);
        //查询订单数据
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<OrderVO> pages = orderMapper.pageQuery(ordersPageQueryDTO);
        //再根据查询到的订单id查询订单详情数据
        for (OrderVO page : pages) {
            //封装到OrderVO类中
            List<OrderDetail> orderDetailList = orderDetailMapper.selectByOrderId(page.getId());
            page.setOrderDetailList(orderDetailList);
        }
        return new PageResult(pages.getTotal(),pages.getResult());
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO queryById(Long id) {
        OrderVO orderVO = new OrderVO();
        //根据订单id查询订单详情
        Orders orders = orderMapper.selectById(id);
        //根据这个订单id查询其订单明细
        List<OrderDetail> orderDetailList = orderDetailMapper.selectByOrderId(orders.getId());
        //封装成OrderVO类
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 取消订单
     * @param id
     */
    @Override
    public void cancel(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.selectById(id);
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = new Orders();
        orders.setId(id);
/*        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            weChatPayUtil.refund(
                    ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }*/
        //如果订单状态为待接单，则修改支付状态为已退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间

        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //查询订单明细信息
        List<OrderDetail> orderDetailList = orderDetailMapper.selectByOrderId(id);
        //将订单详情对象转换为购物车对象
        ShoppingCart shoppingCart = new ShoppingCart();
        for (OrderDetail orderDetail : orderDetailList) {
            BeanUtils.copyProperties(orderDetail,shoppingCart);
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            //将购物车数据插入到数据库中
            shoppingCartMapper.insert(shoppingCart);
        }
        /*//stream流的形式
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(x,shoppingCart,"id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            return shoppingCart;
        }).collect(Collectors.toList());
        shoppingCartMapper.insertBatch(shoppingCartList);*/
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());
        Page<OrderVO> page = orderMapper.pageQuery(ordersPageQueryDTO);
        for (OrderVO orderVO : page) {
            orderVO.setOrderDishes(getOrderDishesStr(orderVO));
        }
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Override
    public OrderStatisticsVO statistics() {
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        //查询每个状态下订单总数
        Integer confirmed = orderMapper.getCountByStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.getCountByStatus(Orders.DELIVERY_IN_PROGRESS);
        Integer toBeConfirmed = orderMapper.getCountByStatus(Orders.TO_BE_CONFIRMED);
        //封装到OrderStatisticsVO类
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param id
     */
    @Override
    public void confirm(Long id) {
        // 直接通过查询获取订单对象
        Orders orders = orderMapper.selectById(id);

        // 检查订单是否存在
        if (orders == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND); // 建议自定义异常
        }

        // 检查订单状态是否为待接单
        if (orders.getStatus() != Orders.TO_BE_CONFIRMED) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 更新订单状态为已接单
        orders.setStatus(Orders.CONFIRMED);
        orderMapper.update(orders);
    }

    /**
     * 商家拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        //查询订单数据
        Orders orders = orderMapper.selectById(ordersRejectionDTO.getId());
        //判断是否存在该订单
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //判断订单状态
        if(!orders.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //退款
        /*//调用微信支付退款接口
        weChatPayUtil.refund(
               ordersDB.getNumber(), //商户订单号
               ordersDB.getNumber(), //商户退款单号
               new BigDecimal(0.01),//退款金额，单位 元
               new BigDecimal(0.01));//原订单金额*/

        //支付状态修改为 退款
        if(orders.getPayMethod().equals(Orders.PAID)) {
            orders.setPayStatus(Orders.REFUND);
        }
        //修改订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 商家取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        //查询订单信息
        Orders orders = orderMapper.selectById(ordersCancelDTO.getId());
        //判断订单是否存在
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //判断订单状态是否为已接单
        if(!orders.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //支付状态修改为 退款
        if(orders.getPayMethod().equals(Orders.PAID))
        {
            //退款 并 更新 支付状态
        /*//调用微信支付退款接口
        weChatPayUtil.refund(
               ordersDB.getNumber(), //商户订单号
               ordersDB.getNumber(), //商户退款单号
               new BigDecimal(0.01),//退款金额，单位 元
               new BigDecimal(0.01));//原订单金额*/
            orders.setPayStatus(Orders.REFUND);
        }
        //更新取消时间 取消原因 订单状态
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void delivery(Long id) {
        //查询订单信息
        Orders orders = orderMapper.selectById(id);
        //判断订单是否存在
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //判断订单状态是否为已接单
        if(!orders.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //更新订单状态为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        Orders orders = orderMapper.selectById(id);
        //判断订单是否存在
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //判断订单状态是否为已接单
        if(!orders.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        orderMapper.update(orders);
    }

    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        Orders orders = new Orders();
        orders = orderMapper.selectById(id);
        if(orders == null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //通过websocket向商家发送消息
        Map map = new HashMap<>();
        map.put("type",2);
        map.put("orderId",orders.getId());
        map.put("content","订单号:"+orders.getNumber());
        String jsonString = JSONObject.toJSONString(map);
        webSocketServer.sendToAllClient(jsonString);

    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orderVO
     * @return
     */
    private String getOrderDishesStr(OrderVO orderVO) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.selectByOrderId(orderVO.getId());

        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());

        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }
}
